Document guide

999 acknowledgment guide

The 999 tells healthcare teams whether a transaction complied with implementation guide expectations.

Validate and simulate 999Replay demo

What the 999 is

The 999 is an implementation acknowledgement used heavily in HIPAA 5010 workflows.

  • Confirms accepted, rejected, or partially accepted state
  • Points to failed segments
  • Guides correction loops

Example segments

ST*999*0006~
AK1*HC*1~
IK5*A~
AK9*A*1*1*1~

Common errors

  • Rejected transaction set in IK5
  • Segment-level IK3 errors
  • Functional group mismatch
  • Implementation guide qualifier mismatch

How SignalEDI handles it

  • Explains IK3/IK5/AK9 statuses in plain language.
  • Routes rejected samples into auto-fix guidance.
  • Connects acknowledgements to claim status workflows.

Related paths

FAQ

Does a 999 mean a claim is paid?
No. It only acknowledges implementation/syntax status, not adjudication or payment.

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